James a



I. A. ANDREWS AND I. w. HERBERT.

HUMIDIFIER.

APPLICATION FILED APR.30. I918- 16,073. PatentedSepIz. 16,1919.

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THE COLUMBIA PLANOGRAPH c0-. WASHINGTON. D. c.

t to the outlet pipes. Uniformity in the humidity of the atmosphere iscontrolled through the instrumentality of a thermostat or automaticexpansion valve 16 arranged in the steam pipe 8.

In some instances, such as when the operations in a mill are firststarted, the steam being shut off and the dampers all turned upwardly orin opened position, the fan may be driven in a reverse direction tocreate a suction through all the pipes 5 as well m as the main pipewhich operation will efliciently relieve the room of foul atmosphere.

. Thus, the atmosphere may easily be changed or renewed and the humiditycontrolled in an eflicient manner. --The construction is simple anddilferent localities may be rendered more humid than others merely bythe control of the dampers.

Having thus described our invention, what we claim as new and desire tosecure by Letters Patent isthe latter over the steam inlet, a drip pipeleading from the steam chamber, and a U- shaped drain trough arranged inthe mixing chamber for conducting condensation waters from the interiorof the shell to the steam chamber.

7 2. A humidifier comprising a series of stepped units, each consistingof a shell opened at both ends, a fan arranged at one end of the unitsfor forcing air axially therethrough, an internal hollow structure ineach shell having a longitudinally extending mixing chamber opening atone end into the shell and having oppositely extending wing conduitsleading from its opposite end and discharging through the shell to theexterior,

a steam chamber arranged exteriorly of the shell and communicating withthe mixing chamber, a perforated bafile interposed between the mixingand steam chambers, a

. steam supply pipe connected to the steam chamber, asolid bafflearranged in the latter over the steam inlet, a drip pipe leading fromthesteam chamber, a U-shaped drain trough arranged in the mixing chamberfor conducting condensation waters from the interior of the shell to thesteam chamber, and dampers controlling the opened forward endsof'themixing chambers, r

3. A humidifier comprising a series of stepped units, each consisting ofa shell opened at both ends, a fan arranged at one end of the units forforcing air axially therethrough, an internal hollow structure in eachshell having a longitudinally extending mixing chamber opening at oneend into the shell and having oppositely-extending wing conduits leadingfrom its opposite end and discharging through the shell to the exterior,a steam chamber exteriorly of the shell and communicating with themixing chamher, a steam supply pipe connected to the steam chamber,means interposed between the steam inlet and the mixing chamber fordiffusing the steam, and means controlling the admission of air throughthe forward opened end of the mixing chamber.

4:. A humidifier comprising a series of stepped units, each consistingof a shell opened at both ends, a fan arranged at one end of the unitsfor forcing air axially therethrough, an internal hollow structure ineach shell having a longitudinally extending mixing chamber opening atone end into the shell and having oppositely extending wing conduitsleading from its opposite end and discharging through the shell to theexterior, and means for moistening the air passing through the mixingchamber.

5. In a humidifier, a shell, means for forcing a current of air axiallytherethrough, a mixing chamber disposed oflt' axis within the shell,means for controlling the admission of air from the shell into thechamber, and means for moistening the air in the cham ber.

63. In a humidifier, a shell, means for forcing a current of air axiallytherethrough, a mixing chamber arranged within the shell to one side ofits axis, said chamber having lateral discharge passages, means forcontrolling the admission of air from the shell into the chamber, andmeans for admitting steam directly into the mixing chamber.

7. In a humidifier, a shell, means for creating a current of airtherethrough, a mixing chamber communicating with the shell, means forcontrolling the admission of air from the shell into the chamber, saidchamber being arranged within the shell and having an outlet leadingthrough the same, a steam chamber communicating with. the mixingchamber, and a foraminous partition between the steam and mixingchambers for diffusing the steam as it enters the mixing chamber.

8. A humidifier comprising a series of stepped units, each consisting ofa shell opened at both ends, a fan arranged at one end of the units forforcing air axially therethrough, an internal hollow structure in eachshell having a longitudinally extending mixing chamber arranged oficenter and opening at its forward end into the shell and at its oppositeend through the shell to the exterior,airmoistening means communicatingwith the chamber, and means controlling the passage of air through thechamber.

9. A humidifier for house and factory ventilation, comprising a singleair-conducting shell having lateral discharge openings at longitudinallyspaced points, and steamsupplying means for each discharge opening tomoisten the outflowing air, and means located in the vicinity of eachdischarge opennames to this specification in the presence of 15 twosubscribing Witnesses.

JAMES A. ANDREWS. J. W. HERBERT.

Witnesses CHAS. M. HoDenoN, MARY J. Hoornn.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner 01' Iatents,

.Washington, D. G.

